Sock



FIG. 1 is a left side perspective view of a sock of the present invention in a position of use, the right side perspective view being a mirror image thereof;

FIG. 2 is a front view of the sock of FIG. 1 in a flat position; and,

FIG. 3 is a rear view of the sock of FIG. 1 in a flat position.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the sock and form no part of the claimed design. 

CLAIM The ornamental design for a sock, as shown and described. 